Ics2403:Distributed Systems Question Paper
Ics2403:Distributed Systems
Course:Bachelor Of Information Technology
Institution: Meru University Of Science And Technology question papers
Exam Year:2010
1
QUESTION ONE – 30 MARKS
a. Give a definition of distributed system and an example. (4 Marks) b. Identify and state the Goals of a distributed system. (4 Marks) c. By use of illustration, compare and contrast network operating systems and distributed systems. (4 Marks) d. Justify why name servers are hierarchically organized. (4 Marks) e. Discuss any three dimensions of transparency in a distributed system. (6 Marks) f. Using diagrams highlight the key difference between synchronous and asynchronous process. (4 Marks) g. Discuss how the principle of Berkeley algorithm is used to synchronize time is a distributed system. (4 Marks)
QUESTION TWO – 20 MARKS
a. Discuss the challenges faced in the design and implementation of distributed system. (4 Marks) b. Distinguish between eager (all) and eager (dirty) methods of process migration. (6 Marks) c. Distributed systems have to be fault tolerant, evaluate the five possible scenarios of crashes failure and how to resolve them. (10 Marks)
QUESTION THREE – 20 MARKS
a. By use of illustration explain the five models of a distributed computing system. (10 Marks) b. Why are distributed systems inherently insecure? (2 Marks) c. Discuss and differentiate how public key and private security can be used in distributed systems. (8 Marks)
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QUESTION FOUR – 20 MARKS
a. List and describe the features of a good distributed file system. (4 Marks) b. Discuss which consistency model is applicable in data centric approach. (4 Marks) c. Discuss the concurrency transaction problems encountered in a distributed system and how they can be addressed. (12 Marks)
QUESTION FIVE – 20 MARKS
a. By use of diagrams demonstrate how a remote procedure call is implemented. (12 Marks) b. Describe mutual exclusion problem in a distributed system and how its resolved. (4 Marks) c. A dimension of robustness of a distributed system is fault tolerance. Discuss what fault tolerance is and how it can be enhanced. (4 Marks)
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